Breast pump



FIG. 1 is a perspective view of the top, front and right side of a breast pump showing our new design;

FIG. 2 is a perspective view of the bottom, rear and right side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof; and,

FIG. 9 is a reference view showing usage situation thereof.

The portions of the article in broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a breast pump, as shown and described. 